JP2012028300A - Backlight assembly, backlight unit, and liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backlight assembly, a backlight unit, and a liquid crystal display device capable of cost reduction easily.SOLUTION: A light-emitting element substrate 26 on which light-emitting elements 25 are mounted is arranged on the front face of a chassis 3, and a first connector 24 is inserted and connected to this. On the other hand, a power supply substrate 31 which supplies power to the light-emitting element substrate 26 is arranged on the rear face of the chassis 3 and a second connector 32 is mounted on this. Then, by mutually insertion-connecting the first connector 24 and the second connector 32, power is supplied from the power supply substrate 31 to the light-emitting element substrate 26 through the first connector 24 and the second connector 32. The second connector 32 may be electrically connected to the power supply substrate 31 through a harness.

Description

  The present invention relates to a backlight assembly for a display device, a backlight unit using the same, and a liquid crystal display device.

  Since display devices using liquid crystals are lighter and thinner and consume less power than display devices such as cathode ray tubes, they are widely used in display devices such as portable devices, computers, and large televisions. Since the liquid crystal itself does not emit light, a backlight unit that emits light from behind the liquid crystal may be used to display a screen on the display device. The backlight unit usually includes a light emitting element substrate having a light emitting element such as an LED (Light Emitting Diode), a power supply substrate that supplies power and a control signal to the light emitting element, and an electrical connection that connects the light emitting element substrate and the power supply substrate. A backlight assembly having a conductive path.

  As the backlight assembly, for example, the light emitting element substrate and the power supply board are fixed to the front and back of the chassis, the harness is passed through the hole provided in the chassis, and the light emitting element substrate and the power supply board are connected to each other using the harness as an electrical conduction path. There is an electrical connection structure (see Patent Document 1). In the backlight assembly having such a structure, it is necessary to close the hole so that dust or the like does not enter the backlight unit through the hole of the chassis.

  Next, an example of a backlight assembly different from that disclosed in Patent Document 1 but having a similar structure will be described with reference to FIGS.

  As shown in FIGS. 31 and 32, a frame 103b is formed on the periphery of the front surface of the chassis 103, and light emitting element substrates 123a to 123f each having a light emitting element 131 such as an LED and a light emitting element connector 133 are formed on the frame 103b. Screwed (light emitting element substrates 123d, 123e, 123f are not shown).

  On the other hand, as shown in FIG. 33, a power supply board 237 for supplying power and control signals to the light emitting element boards 123a to 123f is screwed to the rear surface of the chassis 103. The power supply board connector 237 has a power supply board connector. 235 is mounted.

  The light emitting element substrates 123 a to 123 f and the power supply substrate 237 are electrically connected via a harness 233. Specifically, the harness 233 constitutes a light emitting element side connector 143 whose one end is connected to the light emitting element connector 133 and the other end is connected to a power supply board connector 235 (not shown). )).

  Further, the chassis 103 is provided with a hole 234 through which the harness 233 is passed. The hole 234 is closed with a rubber plug 231, and the rubber plug 231 is provided with a slit-shaped small hole 231 a for allowing the harness 233 to pass through.

As a method for assembling such a backlight assembly, the following steps are required.
(1) The light emitting element substrates 123a to 123f are attached to the chassis 103.
(2) The light emitting element side connector 143 of the harness 233 and the light emitting element connector 133 of the light emitting element substrates 123a to 123f are connected, and the harness 233 is pulled out from the hole 234 to the rear surface side of the chassis 103.
(3) The hole 234 is closed with the rubber plug 231.
(4) The power supply board 237 is fixed to the rear surface of the chassis 103.
(5) The power supply board connector 235 of the power supply board 237 and the power supply board side connector of the harness 233 are connected.

JP 2009-295587 A

  However, in such a structure in which the harness is passed through a hole in the chassis and the front and rear substrates (the light emitting element substrates 123a to 123f and the power supply substrate 237) are connected by connectors, the rubber plug 231, the light emitting element connector 133, and the power supply The board connector 235 and the harness 233 provided with connectors at both ends are indispensable components, and it is difficult to reduce the number of parts beyond this, so there is a problem that cost reduction is difficult.

  In addition, the above-described structure requires a step of connecting the harness through the holes in the chassis and connecting to the front and rear substrates when assembling the assembly. However, like the backlight unit of the liquid crystal display device, the members are stacked. In the structure of assembling (stacking) and assembling, there is a problem that if such a step of passing the harness through the hole is included, workability is extremely deteriorated and man-hours are increased, resulting in increased manufacturing costs.

  In addition, some liquid crystal display devices use the same harness or light-emitting element substrate due to their characteristics, and use different power supply substrates. However, the above structure supports connectors on the harness side regardless of the type of power supply substrate. Since the connector must be mounted on the power supply board, there is a problem that the degree of freedom in designing the power supply board is small and the cost is high.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a backlight assembly, a backlight unit, and a liquid crystal display device that can be reduced in cost more easily than in the past.

  A backlight assembly according to a first exemplary embodiment of the present invention includes a chassis, a light emitting element substrate disposed on a front surface of the chassis and mounted with a light emitting element, and disposed on a rear surface of the chassis. A power supply board for supplying power to the power supply, a first connector held by the chassis and fitted and connected to the light emitting element board, and mounted on the power supply board and fitted and connected to the first connector. And supplying a power from the power supply substrate to the light emitting element substrate via the first connector and the second connector.

  A backlight assembly according to a second exemplary embodiment of the present invention includes a chassis, a light emitting element substrate disposed on a front surface of the chassis and mounted with a light emitting element, and disposed on a rear surface of the chassis. A power supply board for supplying power to the power supply, a first connector held in the chassis and fitted and connected to the light emitting element board, and connected to the power supply board via a harness and connected to the first connector. And a second connector connected by fitting, wherein power is supplied from the power supply substrate to the light emitting element substrate via the first connector and the second connector.

  A backlight unit according to an exemplary aspect of the present invention includes the backlight assembly and an optical system disposed on a front side of the chassis.

  A liquid crystal display device according to an exemplary embodiment of the present invention includes the backlight unit and a liquid crystal display unit, and the optical system is disposed between the backlight assembly and the liquid crystal display unit. And

  According to the present invention, it is possible to provide a backlight assembly, a backlight unit, and a liquid crystal display device that can be reduced in cost more easily than in the past.

The disassembled perspective view of a liquid crystal display device. The disassembled perspective view which shows only a part for demonstrating the process in which the 1st connector is assembled | attached to the chassis of the backlight assembly which concerns on the 1st Embodiment of this invention. The perspective view which shows only a part of the state which assembled | attached the 1st connector to the chassis in 1st Embodiment. The top view of the light emitting element substrate attached to a chassis in 1st Embodiment. The enlarged view which shows only a part of FIG. 4A. The perspective view of the component which attached the member for thermal radiation to the light emitting element board | substrate in 1st Embodiment. The enlarged view which shows only a part of FIG. 5A. FIG. 5B is a perspective view showing a state before the components shown in FIG. 5A are assembled to the chassis. FIG. 6B is an enlarged view showing only a part of FIG. 6A. FIG. 4 is an exploded perspective view showing only a part for explaining a process of assembling a power supply board on which a second connector is mounted in a chassis in the first embodiment. The expanded cross-section perspective view of only the principal part in the state of FIG. The perspective view which shows only a part of the state which assembled | attached the power supply board to the chassis in 1st Embodiment. The 1st connector in 1st Embodiment is shown, (a) is a perspective view, (b) is a top view, (c) is a front view, (d) is a side view. The perspective view of the 1st housing contained in the 1st connector in a 1st embodiment. The perspective view of the 1st contact contained in the 1st connector in a 1st embodiment. The 2nd connector in 1st Embodiment is shown, (a) is a perspective view, (b) is a top view, (c) is a front view, (d) is a side view, (e) is seen from a different direction. Perspective view. The perspective view of the 2nd contact contained in the 2nd connector in 1st Embodiment. The perspective view of the holddown contained in the 2nd connector in 1st Embodiment. Sectional drawing which shows the state before the connection of the 1st connector and 2nd connector in 1st Embodiment. Sectional drawing which shows the 1st connection state of the 1st connector and 2nd connector in 1st Embodiment. Sectional drawing which shows the 2nd connection state of the 1st connector and 2nd connector in 1st Embodiment. Sectional drawing which shows the connection aspect of the 1st connector and power supply board in the backlight assembly which concerns on the 2nd Embodiment of this invention. The perspective view seen from the front (surface) side for demonstrating the process in which the 1st connector is assembled | attached to the chassis of a backlight assembly in 2nd Embodiment. The perspective view seen from the front side for demonstrating the process of connecting a light emitting element board | substrate to the 1st connector assembled | attached to the chassis in 2nd Embodiment. The perspective view similar to FIG. 21 which shows the state by which the light emitting element board | substrate was connected to the 1st connector assembled | attached to the chassis in 2nd Embodiment. The perspective view seen from the back surface (back surface) side of the light emitting element substrate in the state shown in FIG. The perspective view similar to FIG. 23 with which the 2nd connector was connected to the 1st connector. The top view which shows the state in which the 1st connector and the 2nd connector were connected in 2nd Embodiment. The 1st connector in 2nd Embodiment is shown, (a) is a front view, (b) is a rear view, (c) is a top view, (d) is a bottom view, (e) is a right view. Sectional drawing obtained along the AA line of Fig.26 (a). FIG. 28 is a cross-sectional view similar to FIG. 27 showing only a part of the relationship between the first connector and the chassis. Sectional drawing obtained along the BB line of Fig.26 (a). Sectional drawing for description which showed the relationship between the 1st connector and light emitting element board | substrate in 2nd Embodiment. The top view which shows the example of the conventional backlight assembly. FIG. 32 is an enlarged perspective view of a region surrounded by a dotted line in FIG. 31, wherein (a) is an enlarged perspective view of the region α, (b) is an enlarged perspective view of the region β, and (c) is an enlarged perspective view of the region γ. The reverse view of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the overall configuration of the liquid crystal display device 100 will be described with reference to FIG.

  As shown in FIG. 1, a liquid crystal display device 100 includes a front liquid crystal display unit 300 using liquid crystal, a rear backlight unit 200 for irradiating the liquid crystal display unit 300 with light, and a frame on which these are mounted. 15. The backlight unit 200 includes the backlight assembly 1 and an optical system disposed on the front side of the backlight assembly 1, that is, between the backlight assembly 1 and the liquid crystal display unit 300.

  The backlight assembly 1 includes a metal chassis 3. The optical system includes a reflection sheet 5, a light guide plate 7, a diffusion sheet 9, a prism sheet 11, and a light collection sheet 13 that are sequentially stacked on the front surface of the chassis 3.

  Next, the backlight assembly according to the first embodiment will be clarified together with the manufacturing method thereof with reference to FIGS.

  In FIG. 2, the chassis 3 has a rectangular plate-shaped main plate portion 3 a and a frame plate portion 3 b that protrudes to the front side from each side of the main plate portion 3 a or the vicinity thereof. In the vicinity of the frame plate portion 3b on one side of the main plate portion 3a, a recessed portion 3c that is recessed from the front surface to the rear surface is formed, and a chassis hole portion 3d is formed on the bottom surface of the recessed portion 3c. A first connector 24, which will be described in detail later, is inserted and fixed in the chassis hole 3d. FIG. 3 shows a state in which the first connector 24 is mounted on the chassis 3. The entire chassis 3 in which the first connector 24 is installed is shown in FIG. 6A.

  Further, as shown in FIGS. 4A and 4B, two elongated light emitting element substrates 26 each having a large number of light emitting elements 25 such as LEDs (Light Emitting Diodes) mounted in a line on one surface are prepared, and these are shown in FIGS. 5A and 5B. As shown in FIG. 4, the heat dissipating members 27 are arranged in series. These light-emitting element substrates 26 have substrate convex portions 26a that protrude in parallel to one side in the width direction at end portions adjacent to each other. On the other hand, the heat radiating member 27 is formed on the lining portion 27a facing the surface opposite to the surface on which the light emitting element 25 is mounted of the light emitting element substrate 26, the heat radiating portion 27b perpendicular to the lining portion 27a, and the heat radiating portion 27b. And a convex portion insertion opening 27c.

  The light-emitting element substrate 26 is assembled to the heat radiation member 27 with the substrate convex portion 26a inserted through the convex portion insertion port 27c, and uses a plurality of screw holes 26b spaced in the longitudinal direction for heat radiation. The member 27 is fixed with screws. In addition, two conductive contact portions 26c exposed on the opposite side of the heat radiating portion 27b through the convex portion insertion port 27c are provided on one surface of the substrate convex portion 26a. These contact portions 26 c are connected to the light emitting element 25 through the circuit of the light emitting element substrate 26.

  A light-emitting component 28 in which a heat dissipation member 27 is attached to the light-emitting element substrate 26 is disposed on the front surface of the chassis 3 on which the first connector 24 is installed as shown in FIGS. The heat dissipation member 27 is screwed to the chassis 3. Thus, on the front side of the backlight assembly 1 shown in FIG. 1, a large number of light-emitting elements 25 that can be energized via the first connector 24 are arranged and fixed along the vicinity of one piece of the chassis 3.

  On the other hand, a power supply substrate 31 for supplying power to the light emitting element substrate 26 is provided on the rear surface side of the backlight assembly 1 shown in FIG. The power supply board 31 is disposed in parallel to the rear surface of the chassis 3 and is fixed to the chassis 3 by screws.

  As shown in FIGS. 7 and 8, the second connector 32, which will be described in detail later, is mounted on the rear surface of the power supply board 31. The second connector 32 can be fitted with the first connector 24 to obtain an electrical connection. In order to allow the second connector 32 and the first connector 24 to be fitted, the power supply board 31 is formed with a fitting opening 31 a corresponding to the second connector 32.

  FIG. 9 shows a state where the power supply board 31 is arranged and fixed on the rear surface of the chassis 3 with the fitting of the second connector 32 and the first connector 24.

  Next, the first connector 24 will be described with reference to FIGS. 10 to 12 together with FIGS.

  The first connector 24 includes an insulating first housing 34 that penetrates the chassis 3, and four conductive first contacts 35 that are held by the first housing 34.

  The first housing 34 includes two board insertion openings 34a for inserting the two board projections 26a, and a pair of insertion invitation parts 34b for inviting insertion when fitted to the second connector 32, The chassis abutting surface 34c that abuts against the chassis 3 when inserted into the chassis hole 3d and the chassis abutting surface 34c work together as a chassis engaging portion to restrain the first connector 24 with respect to the chassis 3 or A pair of chassis engaging claws 34d having spring properties for fixing and a connector abutting surface 34e that abuts against the second connector 32 when fitted to the second connector 32 are provided. There is a chamfer at the tip of each insertion invitation part 34b to facilitate invitation.

  Each of the first contacts 35 has two press-fit portions 35 a and 35 b that are press-fit into the first housing 34. Here, the press-fit portion 35 a in the intermediate portion of the first contact 35 is referred to as an engaging portion that engages with the first housing 34. A spring portion 35c is formed on one side of the engagement portion 35a of the first contact 35, and a flat plate-like connector contact portion 35d extending linearly is formed on the opposite side of the engagement portion 35a. The spring portion 35c engages with the first housing 34 and the substrate contact portion 35e that makes a one-to-one contact with the contact portion 26c provided on the substrate convex portion 26a of the light emitting element substrate 26, thereby preventing the spring portion 35b from being bent. And a twist preventing portion 35f. The substrate contact portion 35e is disposed in the substrate insertion port 34a.

  Next, the second connector 32 will be described with reference to FIGS. 13 to 15 together with FIGS.

  The second connector 32 includes an insulating second housing 37, four conductive second contacts 38 held in the second housing 37, and a pair of fixed to the second housing 37. Hold-down 39.

  The second housing 37 has a fitting recess 37 a for receiving a portion of the first connector 24 that protrudes rearwardly through the chassis 3. A pair of wide invitation receiving portions 37b are formed at both ends of the fitting recess 37a to receive the pair of insertion invitation portions 34b of the first housing 34, respectively. There is a chamfer around the entrance of the fitting recess 37a for easy invitation.

  Each of the second contacts 38 includes two press-fitting parts or engaging parts 38a that are press-fitted into the second housing 37, a spring part 38b on one side of the engaging part 38a, and the engaging part 38a. Side terminal portion 38c. The terminal portion 38c is soldered and connected to a through hole (not shown) formed in the power supply substrate 31. The spring portion 38b is meandering and has a connector contact portion 38d and a twist preventing portion 38e. The connector contact portion 38 d is a portion for contacting the connector contact portion 35 d of the first contact 35. The twist preventing portion 38e is a portion for engaging the second housing 37 to prevent the spring portion 38b from being twisted.

  The hold-down 39 is made by punching a metal plate and prevents the press-fitting portion 39 a press-fitted into the second housing 37 and the second connector 32 from being lifted from the power supply board 31. A mounting-preventing floating portion 39b and a substrate soldering portion 39c fixed to the through hole (not shown) of the power supply substrate 31 by soldering are provided.

  Next, the connection between the first connector 24 and the second connector 32 will be described with reference to FIGS.

  The first connector 24 and the second connector 32 are aligned as shown in FIG. 16, and both are fitted as in the first embodiment shown in FIG. 17 or the second embodiment shown in FIG. Here, the distance t1 between the chassis 3 and the power supply board 31 in FIG. 17 is narrower than the distance t2 between the chassis 3 and the power supply board 31 in FIG. However, in any case, a desired electrical connection can be obtained between the first connector 24 and the second connector 32. That is, since the effective contact length of the connector contact portion 35d in the first connector 24 is long, it is possible to cope with the position fluctuation of the chassis 3 and the power supply board 31 by changing the contact position.

  Further, according to the above-described structure, a rubber plug and a harness are not required, and a process of connecting the harness to the front and back substrates (light emitting element substrate and power supply substrate) through the hole of the chassis 3 at the time of assembly is unnecessary. Therefore, the number of man-hours can be reduced, and thus the manufacturing cost can be reduced. In addition, since there is no need to connect the harness to the board on the front and back through the holes in the chassis, it is suitable for stacking (stacking) each member and assembling, and the workability during assembly is good, The manufacturing cost of the backlight assembly 1 and the backlight unit 200 can also be suppressed.

  Next, the backlight assembly according to the second embodiment will be described with reference to FIGS. 1 to 18, even if the structure is slightly different, parts having similar functions are denoted by the same reference numerals, and description thereof may be omitted.

  In the backlight assembly according to the first embodiment described with reference to FIGS. 2 to 9, the second connector 32 is mounted on the power supply board 31, but the second connector 32 is attached to the power supply board 31. It may be electrically connected via a flexible harness.

  Further, as shown in FIG. 19, the third connector 42 is connected to the end of the harness 41 opposite to the second connector 32, and the fourth connector 43 mounted and connected to the power supply board 31 is connected to the fourth connector 43. The second connector 32 can be electrically connected to the power supply board 31 via the harness 41, the third connector 42, and the fourth connector 43 by fitting and connecting the three connectors 42. . In this case, the harness 41, the second connector 32, and the third connector 42 may be collectively referred to as a harness connector.

  According to the structure in which the second connector 32 is connected to the power supply board 31 via the flexible harness 41, the position of the second connector 32 is variable with respect to the power supply board 31 fixed to the chassis 3. Therefore, the second connector 32 can be easily aligned with the first connector 24 that is also fixed to the chassis 3.

  With reference to FIG. 20 to FIG. 25, assembly of each component to the chassis 3 in a modification of the backlight assembly 1 will be described.

  First, in FIG. 20, the first connector 24 is inserted into the chassis hole 3 d of the chassis 3 from the front (front) side. At this time, the flange 34f formed on the outer periphery of the first housing 34 of the first connector 24 comes into contact with the main plate portion 3a of the chassis 3, so that the first connector 24 is locked to the chassis 3, and FIG. It becomes a state.

  In FIG. 21, a light emitting component 28 in which a heat dissipation member 27 is attached to a light emitting element substrate 26 on which a large number of light emitting elements 25 are mounted is disposed on the front surface of the chassis 3 on which the first connector 24 is installed. At that time, the two board projections 26a are respectively inserted into the two board insertion openings 34a of the first connector 24, and the state shown in FIG. 22 is obtained.

  In the state of FIG. 22, the heat dissipation member 27 is screwed to the chassis 3. Thus, on the front side of the backlight assembly 1 shown in FIG. 1, a large number of light-emitting elements 25 that can be energized via the first connector 24 are arranged and fixed along the vicinity of one piece of the chassis 3. The first connector 24 is fixed by the flange 34f being sandwiched between the main plate portion 3a and the heat dissipation member 27.

  23, a part of the first connector 24 protrudes on the rear surface (back surface) side of the chassis 3, and two connector insertion holes 34g are formed therein. On the other hand, the second connector 32 is electrically connected to one end of the harness 41. The other end of the harness 41 is electrically connected to a power supply board 31 that is arranged in parallel to the rear surface of the chassis 3 and fixed to the chassis 3 by screws. The second connector 32 is fitted into the connector insertion port 34g of the first connector 24, and the state shown in FIG. 24 is obtained. Thus, power can be supplied from the power supply substrate 31 to the light emitting element substrate 26 via the harness 41, the second connector 32, and the first connector 24.

  The relationship between the first connector 24 and the second connector 32 in the state of FIG. 24 is shown in FIG. In FIG. 25, the lock claw 32 b at one end of the movable lever 32 a provided on the second connector 32 is engaged with the lock portion 34 h of the first connector 24, so that the first connector 24 and the second connector 32 are Is locked in the mated state. By applying an external force F to the other end of the lever 32a, the lock claw 32b can be removed from the lock portion 34h, and the lock between the first connector 24 and the second connector 32 can be easily released.

  Next, the first connector 24 in the backlight assembly according to the second embodiment will be supplemented with reference to FIGS. 26 to 30 together with FIG. Note that portions similar to those of the first connector illustrated in FIGS. 10 to 12 are denoted by the same reference numerals, and description thereof is omitted.

  Referring to FIG. 27 together with FIG. 26, the first housing 34 of the first connector 24 has an elastic portion 34k corresponding to the cut-off portion 34j of the flange 34f at the end opposite to the lock portion 34h. ing. As shown in FIG. 28, the elastic portion 34k is a portion that restrains or fixes the first connector 24 to the chassis 3 in cooperation with the flange 34f. That is, the flange 34f and the elastic portion 34k together serve as a chassis engaging portion.

  Referring to FIG. 29 together with FIG. 26, the relationship between the first housing 34 and the first contact 35 incorporated therein is clearly shown.

  The first housing 34 has four contact receiving holes 44 into which first contacts 35 made of a thin plate-like conductor are press-fitted. Each contact receiving hole 44 is formed in a thin slit shape like the first contact 35, but a wide portion 44a is formed only in a part thereof. The wide portion 44a will facilitate the formation of the contact receiving hole 44 when the first housing 34 is plastic molded.

  Further, the first housing 34 is formed with a notch 45 that allows the first contact 35 to be pressed at the right end in FIG. 29, and the first contact 35 is inspected and confirmed at the left end in FIG. 29. A hole 46 is formed to enable the above.

  The first contact 35 includes a fixed portion (engagement portion) 51 that is press-fitted and fixed to the first housing 34, a pin portion (contact portion) 52 that protrudes from the fixed portion 51 to one side, and the fixed portion 51 to the other side. A spring portion 53 that extends while meandering, a contact portion 55 that is integrally formed with the extended end of the spring portion 53, is preloaded by the spring portion 53 and contacts the contact surface 54 of the first housing 34, and The movable portion 57 extends from the contact portion 55 and is inserted into the guide hole 56 of the first housing 34. The end portion of the contact portion 55 is rounded by an arc-shaped R portion 58. Further, the movable portion 57 is formed with a contact 61, a slope portion 62, and a straight portion 63. The second connector 32 described above is electrically connected to the pin portion 52. Here, the spring 53, the contact portion 55, the movable portion 57, the R portion 58, the contact point 61, the slope portion 62, and the straight portion 63 work together as a spring portion.

  For the second contact 38 shown in FIG. 19, the same reference numerals are given to portions having the same functions as those of the second contact in FIG.

  As shown in FIG. 30, when the substrate convex portion 26a of the light emitting element substrate 26 is inserted into the substrate insertion port 34a of the first housing 34, the inclined portion 62 is pushed by the substrate convex portion 26a, whereby the movable portion 57 is spring-loaded. Retreating against the portion 53, the contact 61 contacts the contact portion 26c of the substrate convex portion 26a.

  Even when the movable portion 57 is retracted, at least a part of the straight portion 63 is designed to be inserted into the guide hole 56. Thereby, the inclination of the straight part 63 can be prevented and the buckling deformation of the spring part 53 can be prevented.

  Further, since the end portion of the contact portion 55 is rounded by the R portion 58, the end portion of the contact portion 55 engages with the inner wall of the contact receiving hole 44 even if the straight portion 63 is slightly inclined. This also prevents malfunctions.

  Moreover, since the height dimension h of the first connector 24 can be made relatively small, it is easy to reduce the overall dimensions of the backlight assembly and the display device using the backlight assembly.

  Each of the first and second embodiments can be variously modified as exemplified below.

  Although the case where the light emitting element substrate 26 is provided only on one side of the chassis 3 is illustrated, the present invention is not necessarily limited to the case where it is provided only on one side, and the light emitting element substrate 26 may be provided on a plurality of sides of the chassis 3.

  The chassis abutting surface 34 c of the first housing 34 is positioned with respect to the chassis 3 by the chassis engaging claws 34 d provided in the first housing 34, but is positioned by the light emitting element substrate 26 fixed to the chassis 3. May be. In the latter case, the first housing 34 can be restrained without the need for providing the first housing 34 with the chassis engaging claws 34d. In either case, the chassis abutting surface 34 c functions as a chassis engaging portion that engages with the chassis 3.

  Instead of being restrained or fixed to the chassis 3, the first housing 34 may be restricted or fixed to another member such as a heat radiating plate (heat sink).

  In addition, this invention is not limited to the said embodiment, The one part or all part can also be described like the following additional remarks, but it is not restricted to them.

(Appendix 1)
A chassis, a light emitting element substrate disposed on the front surface of the chassis and mounted with a light emitting element, a power supply board disposed on the rear surface of the chassis and supplying power to the light emitting element substrate, and held by the chassis; A first connector to which the light emitting element substrate is fitted and connected; and a second connector which is mounted on the power supply substrate and is connected to the first connector, the light emission from the power supply substrate. A backlight assembly, wherein power is supplied to the element substrate via the first connector and the second connector.

(Appendix 2)
A chassis, a light emitting element substrate disposed on the front surface of the chassis and mounted with a light emitting element, a power supply board disposed on the rear surface of the chassis and supplying power to the light emitting element substrate, and held by the chassis; A first connector to which the light emitting element substrate is fitted and connected; and a second connector which is connected to the power supply substrate via a harness and is fitted and connected to the first connector. A backlight assembly, wherein power is supplied from a substrate to the light emitting element substrate via the first connector and the second connector.

(Appendix 3)
The backlight according to claim 1 or 2, wherein the first connector includes an insulative first housing penetrating the chassis and a conductive first contact held by the first housing. assembly.

(Appendix 4)
The first contact includes an engaging portion engaged with the first housing, a spring portion provided on one side of the engaging portion and contacting the light emitting element substrate, and an opposite side of the engaging portion. The backlight assembly according to appendix 3, further comprising: a contact portion that is provided on the second connector and contacts the second connector.

(Appendix 5)
5. The backlight assembly according to appendix 3 or 4, wherein the first housing includes an insertion port into which the light emitting element substrate is inserted and a chassis engagement portion that engages with the chassis.

(Appendix 6)
The second connector includes an insulating second housing, a conductive second contact held by the second housing, and a holddown fixed to the second housing, The backlight assembly according to any one of appendices 1, 3, 4, and 5, wherein the hold down is fixed to the power supply board by soldering.

(Appendix 7)
The said 2nd contact has an engaging part engaged with the said 2nd housing, and the spring part for contacting the contact part of the said 1st contact, It is any one of the appendixes 1-6. The backlight assembly as described.

(Appendix 8)
A backlight unit comprising: the backlight assembly according to any one of appendices 1 to 7; and an optical system disposed on a front side of the chassis.

(Appendix 9)
The backlight unit according to appendix 8, wherein the optical system includes a reflection sheet, a light guide plate, a diffusion sheet, a prism sheet, and a light collection sheet, which are sequentially stacked on the front surface of the chassis.

(Appendix 10)
A liquid crystal display device comprising the backlight unit according to appendix 8 or 9 and a liquid crystal display unit, wherein the optical system is disposed between the backlight assembly and the liquid crystal display unit.

(Appendix 11)
The liquid crystal display device according to appendix 10, including a frame on which the backlight unit and the liquid crystal display unit are mounted.

  The present invention is applicable to a liquid crystal display device such as a liquid crystal monitor of a television receiver.

DESCRIPTION OF SYMBOLS 100 Liquid crystal display device 200 Backlight unit 300 Liquid crystal display part 1 Backlight assembly 3 Chassis 3a Main board part 3b Frame board part 3c Recessed part 3d Chassis hole part 5 Reflection sheet 7 Light guide plate 9 Diffusion sheet 11 Prism sheet 13 Condensing sheet 15 Frame 24 First connector 25 Light emitting element 26 Light emitting element substrate 26a Substrate convex portion 26b Screw hole 26c Contact portion 27 Heat radiating member 27a Backing portion 27b Heat radiating portion 27c Protruding portion insertion port 28 Light emitting component 31 Power supply substrate 31a Fitting opening 32 2 connector 32a movable lever 32b lock claw 34 first housing 34a board insertion slot (insertion slot)
34b Insertion-inducing portion 34c Chassis abutting surface 34d Chassis engaging claw 34e Connector abutting surface 34f Flange 34g Connector insertion port 34h Locking portion 34j Breaking portion 34k Elastic portion 35 First contact 35a Press-fit portion (engaging portion)
35b Press-fit part 35c Spring part 35d Connector contact part (contact part)
35e Substrate contact portion 35f Warpage prevention portion 37 Second housing 37a Recess for fitting 37b Guide receiving portion 38 Second contact 38a Engagement portion 38b Spring portion 38c Terminal portion 38d Connector contact portion 38e Warpage prevention portion 39 Hold down 39a Press fit portion 39b Floating prevention portion 39c mounting soldering portion 41 harness 42 third connector 43 fourth connector 44 contact receiving hole 44a wide portion 51 fixing portion (engaging portion)
52 Pin part (contact part)
53 Spring part 54 Contact surface 55 Contact part 56 Guide hole 57 Movable part 58 R part 61 Contact 62 Slope part 63 Straight part 103 Chassis 103b Frame 123a-123c Light emitting element substrate 131 Light emitting element 133 Light emitting element connector 143 Light emitting element side connector 231 Rubber plug 231a Small hole 233 Harness 234 Hole 235 Power supply board connector 237 Power supply board

Claims (11)

  A chassis, a light emitting element substrate disposed on the front surface of the chassis and mounted with a light emitting element, a power supply board disposed on the rear surface of the chassis and supplying power to the light emitting element substrate, and held by the chassis; A first connector to which the light emitting element substrate is fitted and connected; and a second connector which is mounted on the power supply substrate and is connected to the first connector, the light emission from the power supply substrate. A backlight assembly, wherein power is supplied to the element substrate via the first connector and the second connector.   A chassis, a light emitting element substrate disposed on the front surface of the chassis and mounted with a light emitting element, a power supply board disposed on the rear surface of the chassis and supplying power to the light emitting element substrate, and held by the chassis; A first connector to which the light emitting element substrate is fitted and connected; and a second connector which is connected to the power supply substrate via a harness and is fitted and connected to the first connector. A backlight assembly, wherein power is supplied from a substrate to the light emitting element substrate via the first connector and the second connector.   3. The back according to claim 1, wherein the first connector includes an insulating first housing that penetrates the chassis, and a conductive first contact that is held by the first housing. 4. Light assembly.   The first contact includes an engaging portion that engages with the first housing, a spring portion that is provided on one side of the engaging portion and that contacts the light emitting element substrate, and is opposite to the engaging portion. The backlight assembly according to claim 3, further comprising: a contact portion that is provided on the second connector and contacts the second connector.   5. The backlight assembly according to claim 3, wherein the first housing has an insertion port into which the light emitting element substrate is inserted, and a chassis engaging portion that engages with the chassis.   The second connector includes an insulating second housing, a conductive second contact held by the second housing, and a holddown fixed to the second housing, The backlight assembly according to claim 1, wherein the hold-down is soldered and fixed to the power supply substrate.   The said 2nd contact has an engaging part engaged with the said 2nd housing, and a spring part for contacting the contact part of the said 1st contact, The any one of Claims 1-6. The backlight assembly described in.   A backlight unit comprising: the backlight assembly according to claim 1; and an optical system disposed on a front side of the chassis.   The backlight unit according to claim 8, wherein the optical system includes a reflection sheet, a light guide plate, a diffusion sheet, a prism sheet, and a light collection sheet, which are sequentially stacked on the front surface of the chassis.   10. A liquid crystal display device comprising the backlight unit according to claim 8 and a liquid crystal display unit, wherein the optical system is disposed between the backlight assembly and the liquid crystal display unit. .   The liquid crystal display device according to claim 10, comprising a frame on which the backlight unit and the liquid crystal display unit are mounted.

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